Thread A:

Program received signal SIGINT, Interrupt.
[Switching to Thread 0xf7521b70 (LWP 1884)]
0xf7fdf430 in __kernel_vsyscall ()
(gdb) bt
#0  0xf7fdf430 in __kernel_vsyscall ()
#1  0xf7f00e43 in __lll_lock_wait_private ()
    at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/lowlevellock.S:95
#2  0xf7e960f3 in _L_lock_56 () from /lib32/libc.so.6
#3  0xf7e8fab3 in ptmalloc_lock_all () at arena.c:288
#4  0xf7ebd127 in __libc_fork ()
    at ../nptl/sysdeps/unix/sysv/linux/i386/../fork.c:95
#5  0xf7fb49a4 in __fork () at ../nptl/sysdeps/unix/sysv/linux/pt-fork.c:26
#6  0x08049a60 in main.main() ()
#7  0x0804dd81 in tango.core.Thread.Thread.run() ()
#8  0x0804d2b2 in thread_entryPoint ()
#9  0xf7faa96e in start_thread (arg=0xf7521b70) at pthread_create.c:300
#10 0xf7ef3b5e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130


Thread B:

#0  0xf7fdf430 in __kernel_vsyscall ()
#1  0xf7e4ed2e in do_sigsuspend (set=0xf7d21cf8)
    at ../sysdeps/unix/sysv/linux/sigsuspend.c:63
#2  __sigsuspend (set=0xf7d21cf8)
    at ../sysdeps/unix/sysv/linux/sigsuspend.c:78
#3  0x0804d3a6 in thread_suspendHandler ()
#4  <signal handler called>
#5  0xf7e94c5e in __libc_malloc (bytes=10000) at malloc.c:3657
#6  0x08049a88 in main.main() ()
#7  0x0804dd81 in tango.core.Thread.Thread.run() ()
#8  0x0804d2b2 in thread_entryPoint ()
#9  0xf7faa96e in start_thread (arg=0xf7d22b70) at pthread_create.c:300
#10 0xf7ef3b5e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130



module main;

import tango.core.Exception;
import tango.io.Stdout;
import tango.core.Memory;
import tango.stdc.stdlib;
import tango.util.log.Log;
import tango.sys.Process;
import tango.core.Thread;
import tango.stdc.posix.unistd;
import ocean.util.log.Trace;

void main()
{
    void doFork ( )
    {
        while (true)
        {
            Trace.formatln("Suspending");
            thread_suspendAll();
            if ( fork() != 0 )
            {
                Trace.formatln("Forked");
                thread_resumeAll();
                Trace.formatln("Resuming");
            }
            else
            {
                Trace.formatln("Forked-Child, Exiting");
                exit(1);
            }
        }
    }

    void doMalloc ( )
    {
        while ( true)
        {
            Trace.formatln("Malloc, allocating");
            auto mem = malloc(10000);
            Trace.formatln("Malloc, freeing");
            free(mem);
        }
    }

    auto fork   = new Thread(&doFork);
    auto malloc = new Thread(&doMalloc);

    malloc.start;
    fork.start;
}